add serial logging for exceptions, fix virtualbox issue

1 files changed, 27 insertions, 0 deletions

diff --git a/kernel/include/hilbert/kernel/serial.hpp b/kernel/include/hilbert/kernel/serial.hpp
new file mode 100644
index 0000000..e7a44f2
--- /dev/null
+++ b/kernel/include/hilbert/kernel/serial.hpp
@@ -0,0 +1,27 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace hilbert::kernel {
+
+  extern "C" void serial_init();
+
+  extern "C" void serial_putchar(char ch);
+
+  static inline void serial_putstr(const char *str) {
+    while (*str) {
+      serial_putchar(*str);
+      ++str;
+    }
+  }
+
+  template <int digits, int dot_every = 4>
+  static inline void serial_puthex(uint64_t n) {
+    for (int d = digits - 1; d >= 0; --d) {
+      serial_putchar("0123456789abcdef"[(n >> (d * 4)) & 0xf]);
+      if (d % dot_every == 0 && d != 0)
+        serial_putchar('.');
+    }
+  }
+
+}